Gas turbine anti-icing system

Abstract

Embodiments of the present disclosure are directed towards a system having a compressor bleed air recirculation system. The compressor bleed air recirculation system includes a compressor bleed air line extending from a compressor to an air intake, wherein the compressor bleed air line is configured to flow a compressor bleed air flow, and the air intake is configured to supply an air flow to the compressor. The compressor bleed air recirculation system further includes an eductor disposed along the compressor bleed air line between the compressor and the air intake, wherein the eductor is configured to receive and mix the compressor bleed air flow and a first ambient air flow to form a first air mixture.

1 . A system, comprising:
 a compressor bleed air recirculation system, comprising:   a compressor bleed air line extending from a compressor to an air intake, wherein the compressor bleed air line is configured to flow a compressor bleed air flow, and the air intake is configured to supply an air flow to the compressor; and   an eductor disposed along the compressor bleed air line between the compressor and the air intake, wherein the eductor is configured to receive and mix the compressor bleed air flow and a first ambient air flow to form a first air mixture.   
     
     
         2 . The system of  claim 1 , wherein the air intake comprises a bleed air rake, and the bleed air rake is configured to receive the first air mixture from the compressor bleed air line. 
     
     
         3 . The system of  claim 2 , wherein the bleed air rake comprises a conduit with apertures, and the apertures are configured to flow the first air mixture into the air intake. 
     
     
         4 . The system of  claim 3 , wherein the air intake comprises an inlet configured to receive a second ambient air flow, and the air intake is configured to mix the first air mixture and the second ambient air flow to form a second air mixture. 
     
     
         5 . The system of  claim 4 , wherein the air intake is configured to supply the second air mixture to the compressor. 
     
     
         6 . The system of  claim 1 , comprising a bleed valve disposed along the compressor bleed air line between the compressor and the eductor. 
     
     
         7 . The system of  claim 6 , wherein the bleed valve is configured to regulate a flow rate of the compressor bleed air flow through the compressor bleed air line, and the bleed valve is configured to be operated by a controller. 
     
     
         8 . The system of  claim 7 , comprising the controller configured to operate the bleed valve based on feedback from at least one sensor of the compressor bleed air recirculation system. 
     
     
         9 . The system of  claim 8 , wherein the at least one sensor comprises a first temperature sensor configured to measure a first temperature of the compressor bleed air flow, a first pressure sensor configured to measure a first pressure of the compressor bleed air flow, a second temperature sensor configured to measure a second temperature of the first air mixture, a second pressure sensor configured to measure a second pressure of the first air mixture, or a third temperature sensor configured to measure a third temperature of the air flow supplied to the compressor by the air intake. 
     
     
         10 . The system of  claim 1 , comprising a gas turbine system having the compressor bleed air recirculation system, the compressor, a combustor, and a turbine. 
     
     
         11 . The system of  claim 1 , wherein the air intake comprises a housing and a filter configured to filter air flow supplied to the compressor. 
     
     
         12 . A system, comprising:
 a gas turbine system, comprising:
 a turbine; 
 a combustor; 
 a compressor having an air intake, wherein the air intake is configured to supply an air flow to the compressor; 
 a first temperature sensor configured to measure a temperature of the air flow; and 
 a compressor bleed air recirculation system, comprising:
 a compressor bleed air line extending from the compressor to the air intake; 
 an eductor disposed along the compressor bleed air line between the compressor and the air intake, wherein the eductor is configured to receive and mix a compressor bleed air flow from the compressor and a first ambient air flow to form a first air mixture, and the eductor is configured to flow the first air mixture to the air intake. 
 
   
     
     
         13 . The system of  claim 12 , wherein the air intake comprises a housing, and the housing includes an air filter and a bleed air rake configured to receive the first air mixture and flow the first air mixture into the housing. 
     
     
         14 . The system of  claim 13 , wherein the housing is configured to receive a second ambient air flow and mix the second ambient air flow with the first air mixture to form the air flow supplied to the compressor. 
     
     
         15 . The system of  claim 14 , wherein the compressor bleed air recirculation system comprises a bleed valve disposed along the compressor bleed air line between the eductor and the compressor, and the bleed valve is configured to regulate a flow rate of the compressor bleed air flow. 
     
     
         16 . The system of  claim 15 , comprising a controller configured to regulate the operation of the bleed valve based on feedback from the first temperature sensor. 
     
     
         17 . A gas turbine system, comprising:
 a compressor;   an air intake configured to supply a first air flow to the compressor, the air intake comprising:
 a housing; 
 an air filter configured to filter the first air flow; and 
 a bleed air rake configured to receive a second air flow and flow the second air flow into the housing; and 
   a compressor bleed air recirculation system, comprising:
 a compressor bleed air line extending from the compressor to the bleed air rake of the air intake; 
 an eductor disposed along the bleed air line between the compressor and the bleed air rake, wherein the eductor is configured to receive a compressor bleed air flow from the compressor and a first ambient air flow to form the second air flow, and the eductor is configured to flow the second air flow to the bleed air rake; and 
 a bleed valve disposed along the compressor bleed air line between the eductor and the compressor, wherein the bleed valve is configured to regulate a flow rate of the compressor bleed air flow. 
   
     
     
         18 . The system of  claim 17 , wherein the housing of the air intake is configured to receive a second ambient air flow, and the housing of the air intake is configured to mix the second ambient air flow and the second air flow to form the first air flow. 
     
     
         19 . The system of  claim 18 , wherein the compressor bleed air recirculation system comprises a plurality of sensors, wherein the plurality of sensors comprises a first temperature sensor configured to measure a first temperature of the first air flow, a second temperature sensor configured to measure a second temperature of the compressor bleed air flow, a third temperature sensor configured to measure a third temperature of the second air flow, a fourth temperature sensor configured to measure a fourth temperature of the second ambient air flow, a first pressure sensor configured to measure a first pressure of the compressor bleed air flow, a second pressure sensor configured to measure a second pressure of the second air flow, a relative humidity sensor configured to measure a first relative humidity of the second ambient air flow, or a combination thereof. 
     
     
         20 . The system of  claim 19 , wherein the compressor bleed air recirculation system comprises a controller configured to operate the bleed air valve based on feedback from at least one of the plurality of sensors.